DOWNLOAD Panasonic KX-AT7730RU Service Manual ↓ Size: 3.19 MB | Pages: 44 in PDF or view online for FREE

Model
KX-AT7730RU
Pages
44
Size
3.19 MB
Type
PDF
Document
Service Manual
Brand
Device
Telephone / PROPRIETARY TELEPHONE
File
kx-at7730ru.pdf
Date

Panasonic KX-AT7730RU Service Manual ▷ View online

2
KX-AT7730 Series
TABLE OF CONTENTS
PAGE
1 Safety Precautions -----------------------------------------------3
1.1. For Service Technicians  ---------------------------------3
2 Warning --------------------------------------------------------------3
2.1. Information for Users on Collection and 
Disposal of Old Equipment and used Batteries-----3
2.2. About Lead Free Solder (PbF: Pb free) --------------4
2.2.1. Suggested PbF Solder -------------------------------4
2.3. Discarding of P. C. Board --------------------------------4
3 Specifications ------------------------------------------------------5
4 Technical Descriptions------------------------------------------6
4.1. Block Diagram ----------------------------------------------6
4.2. Circuit Operations------------------------------------------7
4.2.1. KEY INPUT CONTROL CIRCUIT-----------------7
4.2.2. LED CIRCUIT ------------------------------------------8
4.2.3. DATA COMMUNICATION CIRCUIT --------------9
4.2.4. TONE GENERATION CIRCUIT ----------------- 10
4.2.5. HANDSET CIRCUIT-------------------------------- 11
4.2.6. SPEAKERPHONE CIRCUIT --------------------- 12
5 Location of Controls and Components------------------ 14
5.1. Name and Locations ------------------------------------ 14
6 Installation Instructions--------------------------------------- 16
6.1. Connections ----------------------------------------------- 16
7 Troubleshooting Guide---------------------------------------- 17
7.1. NO OPERATION ----------------------------------------- 17
7.2. HANDSET TROUBLE----------------------------------- 18
7.3. SPEAKER-PHONE TROUBLE ----------------------- 19
7.4. TONE DIAL TORUBLE --------------------------------- 20
7.5. THE ELECTRONIC VOLUME OF THE 
SPEAKER-PHONE DOES NOT WORK ----------- 20
7.6. THE ELECTRONIC VOLUME OF HANDSET 
DOES NOT WORK -------------------------------------- 20
8 Disassembly and Assembly Instructions--------------- 21
9 Maintenance ------------------------------------------------------ 23
9.1. How To Replace a Flat Package IC ----------------- 23
9.1.1. Preparation-------------------------------------------- 23
9.1.2. Removal Procedure--------------------------------- 23
9.1.3. Procedure --------------------------------------------- 23
9.1.4. Removing Solder From Between Pins --------- 23
10 Schematic Diagram--------------------------------------------- 24
10.1. for KX-AT7730X, XB / KX-AT7730SX, SXB ------- 24
10.2. for KX-AT7730NE / KX-AT7730HK, HKB ---------- 25
10.3. for KX-AT7730UE, UEB -------------------------------- 26
10.4. for KX-AT7730RU ---------------------------------------- 27
11 Printed Circuit Board ------------------------------------------ 28
11.1. COMPONENT VIEW------------------------------------ 28
11.2. BOTTOM VIEW------------------------------------------- 29
12 Appendix Information of Schematic Diagram --------- 30
13 Exploded View and Replacement Parts List ----------- 31
13.1. CABINET AND ELECTRICAL PARTS 
LOCATION------------------------------------------------- 31
13.2. ACCESSORIES AND PACKING MATERIALS --- 32
13.3. Replacement Parts List --------------------------------- 33
13.3.1. Cabinet and Electrical Parts ---------------------- 33
13.3.2. Accessories and Packing Materials------------- 34
13.3.3. Main Board Parts ------------------------------------ 34
14 History -------------------------------------------------------------- 44
3
KX-AT7730 Series
1 Safety Precautions
1. Before servicing, unplug the AC power cord to prevent an electric shock.
2. When replacing parts, use only the manufacturer's recommended components.
3. Check the condition of the power cord. Replace if wear or damage is evident.
4. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.
5. Before returning the serviced equipment to the customer, be sure to perform the following insulation resistance test to prevent
the customer from being exposed to shock hazards.
1.1.
For Service Technicians 
• Repair service shall be provided in accordance with repair technology information such as service manual so as to prevent fires,
injury or electric shock, which can be caused by improper repair work.
1. When repair services are provided, neither the products nor their parts or members shall be remodeled.
2. If a lead wire assembly is supplied as a repair part, the lead wire assembly shall be replaced.
3. FASTON terminals shall be plugged straight in and unplugged straight out.
• ICs and LSIs are vulnerable to static electricity.
When repairing, the following precautions will help prevent recurring malfunctions.
1. Cover plastic parts boxes with aluminum foil.
2. Ground the soldering irons.
3. Use a conductive mat on worktable.
4. Do not grasp IC or LSI pins with bare fingers.
2 Warning
2.1.
Information for Users on Collection and Disposal of Old Equipment and 
used Batteries
4
KX-AT7730 Series
2.2.
About Lead Free Solder (PbF: Pb free)
Note:
In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder that 
contains lead.
We will use PbF solder when discussing the lead free solder used in our manufacturing process which is made from Tin (Sn), 
Silver (Ag), and Copper (Cu).
This model, and others like it, manufactured using lead free solder will have PbF stamped on the PCB. For service and repair 
work we suggest using the same type of solder.
Caution
• PbF solder has a melting point that is 50 °F - 70 °F (30 °C - 40 °C) higher than Pb solder. Please use a soldering iron with 
temperature control and adjust it to 700 °F ± 20 °F (370 °C ± 10 °C).
• Exercise care while using higher temperature soldering irons.: 
Do not heat the PCB for too long time in order to prevent solder splash or damage to the PCB.
• PbF solder will tend to splash if it is heated much higher than its melting point, approximately 1100 °F (600 °C).
• When applying PbF solder to double layered boards, please check the component side for excess which may flow onto the 
opposite side (See the figure below).
2.2.1.
Suggested PbF Solder
There are several types of PbF solder available commercially. While this product is manufactured using Tin, Silver, and Copper,
(Sn+Ag+Cu), you can also use Tin and Copper, (Sn+Cu), or Tin, Zinc, and Bismuth, (Sn+Zn+Bi). Please check the manufac
turer's specific instructions for the melting points of their products and any precautions for using their product with other 
materials. 
The following lead free (PbF) solder wire sizes are recommended for service of this product: 0.3mm, 0.6mm and 1.0mm.
2.3.
Discarding of P. C. Board
When discarding P. C. Board, delete all personal information such as telephone directory and caller list or scrap P. C. Board.
5
KX-AT7730 Series
3 Specifications
Item
Display
Specifications
16 character x 1 line (No backlight)
Flexible Buttons
12
Speaker
1
Microphone
1
Headset Jack
1 (ø 2.5 mm)
Dimensions
(Width x L Depth x L Height;
 handset on cradle, stand
 attached)
LOW ANGLE : 189 mm x  211 mm x  133 mm
HIGH ANGLE : 189 mm x  199 mm x  152 mm
Weight
(with handset, handset cord
 and stand)
800 g
 2 pair wire
Calling Method
Operating Environment
0     to 40    
Design and specifications are subject to change without notice.
Page of 44
Display

Panasonic KX-AT7730RU Service Manual ▷ Download

  • DOWNLOAD Panasonic KX-AT7730RU Service Manual ↓ Size: 3.19 MB | Pages: 44 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Panasonic KX-AT7730RU in PDF for free, which will help you to disassemble, recover, fix and repair Panasonic KX-AT7730RU Telephone. Information contained in Panasonic KX-AT7730RU Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.